A machining device

Abstract

The present invention relates to machining devices, especially to the devices for grinding, polishing and cleaning tube like members. A machining device (1) comprises a support (2) with a motor; a split support disc (10) fixed to the support (2), a split rotatable disc (20) installed in the split support disc (10) in a rotatable manner; three machining units (30) connected to the split rotatable disc (20). The motor with its transmission (14) provides a rotation of the split rotatable disc (20) within the split support disc (10), which in turn provides a drive to each of machining units (30). Each machining unit (30) comprises a machining belt (34) that is driven by the rotation of the of the split rotatable disc (20) within the split support disc (10).

1 . A machining device ( 1 ) comprising:
 a support ( 2 ), wherein the support ( 2 ) comprises a drive motor and a drive axis ( 3 ) extending from the support ( 2 ) and connected to the motor, and wherein the support ( 2 ) comprises a main drive pulley ( 4 ) attached to the drive axis ( 3 ) of the drive motor;   a split support disc ( 10 ) fixed to the support ( 2 ), wherein the split support disc ( 10 ) comprises:   a through hole ( 11 ) in the centre of the split support disc ( 10 );   a removable section ( 12 ), which is a part of the split support disc ( 10 ) and configured to be removable attached and detached from the split support disc ( 10 );   two slave drive pulleys ( 13 ) rotatable attached to the split support disc ( 10 ) and configured to be driven by the main drive pulley ( 4 ) of the support ( 2 ) through a transmission ( 14 ); and   two support disc drive rollers ( 15 ) where each support disc drive roller ( 15 ) is connected to respective slave drive pulley ( 13 ) so that the rotation ( 13 A) of the slave drive pulley ( 13 ) rotates ( 15 A) the support disc drive roller ( 15 );   a circumferential flange ( 16 ) formed on a circumference of the split support disc ( 10 );   a pressure roller ( 17 ) arranged at the circumference of the split support disc ( 10 ) and configured to bear against the split rotatable disc ( 20 ), in result of which a split rotatable disc ( 20 ) is securely held and rotated ( 20 A) at the support disc ( 10 ) by means of two support disc drive rollers ( 15 ) and the pressure roller ( 17 );   the split rotatable disc ( 20 ) installed in the split support disc ( 10 ) in a rotatable manner so that the split rotatable disc ( 20 ) can rotate ( 20 A) relative to the support disc ( 10 ) and a central axis (X) of the split rotatable disc ( 20 ) is concentric with a central axis (X) of the split support disc ( 10 ), wherein the split rotatable disc ( 20 ) comprises:   a through hole ( 21 ) in the centre of the split rotatable disc ( 20 );   a removable split disc section ( 22 ), which is a part of the split rotatable disc ( 20 ) and configured to be removable attached and detached from the split rotatable disc ( 20 );   a circumferential drive slot ( 23 ) formed on a circumference of the split rotatable disc ( 20 ) so that the support disc drive rollers ( 15 ) of the split support disc ( 10 ) are in engagement with the circumferential drive slot ( 23 ) of the split rotatable disc ( 20 ) and rotation ( 15 A) of the support disc drive rollers ( 15 ) of the split support disc ( 10 ) rotates ( 20 A) the split rotatable disc ( 20 );   three machining units ( 30 ) connected to the split rotatable disc ( 20 ), wherein each machining unit ( 30 ) comprises:   a frame ( 35 );   a machining unit drive roller ( 31 ) rotatably connected to the frame ( 35 ) of the machining unit ( 30 ) and configured to be in engagement with the circumferential flange ( 16 ) of the split support disc ( 10 ) so that in result of rotation ( 20 A) of the split rotatable disc ( 20 ) the machining unit drive roller ( 31 ) rolls ( 31 A) along the circumferential flange ( 16 ) of the split support disc ( 10 ) providing rotation ( 31 A) of the machining unit drive roller ( 31 );   a machining belt drive roller ( 32 ) connected to the machining unit drive roller ( 31 ) so that the rotation ( 31 A) of the machining unit drive roller ( 31 ) rotates ( 32 A) the machining belt drive roller ( 32 );   a machining belt support roller ( 33 ) rotatably connected to the frame ( 35 ) of the machining unit ( 30 );   a machining belt ( 34 ) arranged around the machining unit drive roller ( 31 ) and the machining belt support roller ( 33 );   a tension roller ( 36 ) configured to tension the machining belt ( 34 ).   
     
     
         2 . The machining device ( 1 ) according to  claim 1 , characterized in that the split rotatable disc ( 20 ) comprises a locking mechanism ( 24 ) configured to lock the removable split disc section ( 22 ) to the split rotatable disc ( 20 ) and unlock the removable split disc section ( 22 ) from the split rotatable disc ( 20 ). 
     
     
         3 . The machining device ( 1 ) according to  claim 1 , characterized in that the pressure roller ( 17 ) of the split support disc ( 10 ) comprises a tensioning mechanism ( 18 ) configured to provide a tension to the pressure roller ( 17 ) against the split rotatable disc ( 20 ). 
     
     
         4 . The machining device ( 1 ) according to  claim 1 , characterized in that the device ( 1 ) further comprises a suspension ( 40 ) of the machining unit drive roller ( 31 ), wherein the suspension ( 40 ) comprises a lever ( 41 ) having a first end ( 42 ) and a second end ( 43 ), wherein the first end ( 42 ) of the lever ( 41 ) is rotatably connected to the split rotatable disc ( 20 ) and the second end ( 43 ) of the lever ( 41 ) is rotatably connected to the machining unit drive roller ( 31 ), and wherein the suspension ( 40 ) comprises a tensioner ( 44 ) connected to the lever ( 41 ) and configured to push the lever ( 41 ) radial in relation to the split rotatable disc ( 20 ), in result of which the machining unit drive roller ( 31 ) is constantly pressed against the circumferential flange ( 16 ) of the split support disc ( 10 ). 
     
     
         5 . The machining device ( 1 ) according to  claim 4 , characterized in that the device ( 1 ) further comprises a toothed rack ( 45 ) connected to the lever ( 41 ) of the suspension ( 40 ) of the machining unit drive roller ( 31 ) and configured to adjust the position of the lever ( 41 ) in relation to the split rotatable disc ( 20 ). 
     
     
         6 . The machining device ( 1 ) according to  claim 1 , characterized in that the device ( 1 ) comprises a tube support unit ( 50 ) connected to the split support disc ( 10 ), wherein the tube support unit ( 50 ) comprises a frame ( 51 ), a support lever ( 52 ) rotatably connected to the frame ( 51 ) and a suspension member ( 53 ) rotatably connected to the frame ( 51 ) and to the support lever ( 52 ), and a hand knob ( 54 ) connected to the frame ( 51 ) and configured to adjust the tube support unit ( 50 ).